Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
Nonisolated
Compact, low profile surface mount package
Wide input
High efficiency means less power dissipation
Excellent thermal performance
Optimized for cost
Remote on/off
Undervoltage lockout (UVLO)
Over current and short circuit protection
Remote sense
Active high/low
Description
The Bel S7DB-10E modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal
4.5V to 13.2V source. These converters are available in a range of output voltages from 1.0V to 5.0V. The output is closely
regulated and the efficiency of the 3.3V output module is typically 88% at full load. The modules are packaged in a compact,
low profile, surface mount DIP package for ease of layout and space savings. 10A maximum output is also provided. Standard
features include remote on/off, remote sense, over current and short circuit protection, UVLO and output voltage adjust.
These products may be used almost anywhere low voltage silicon is employed and a 4.5V to 13.2V source is available.
Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
page 1
S7DB-10E Series
Distributed power architectures
Data networking equipment
Telecommunications
Computers and peripherals
Part Number Selection
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 2
Input Specifications
Absolute Maximum Ratings
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Note: Input capacitance two 270F/16V, ESR = 0.018
max at 100kHz @ 25 C.
1. With simulated source impedance of 500nH, 5Hz to 20MHz.
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 3
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
1. Vin = 8V, Iout = full load, Ta = 25 C.
2. Two 270F/16V with ESR = 0.018
max at input, 0 - 20MHz BW, 1F ceramic cap and 10F aluminum cap at output.
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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 4
Output Specifications
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
3. di/dt = 0.5A/S, Ta = 25 C with external 220F Tan cap.
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6
0
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1
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d
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%
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t
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0
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t
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3
1
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t
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4
t
u
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t
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0
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1
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8
0
5
1
V
m
e
m
i
T
g
n
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t
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s
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0
6
0
0
1
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d
a
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L
x
a
M
f
o
%
0
5
o
t
%
0
0
1
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0
8
0
5
1
V
m
e
m
i
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g
n
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t
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s
T
0
6
0
0
1
s
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 5
Control Specifications
General Specifications
1. Vin=12V, full load and Ta=25 C.
2. See graphs on pages 13 - 16.
Note: For 3.3V output module, when the input voltage is between 4.5Vdc to 5.0Vdc, the output voltage
trim range is 90%-105%, and the remote sense compensation is 5%.
3. With remote on/off pin 8 open, the module is on.
r
e
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8
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8
5
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3
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8
6
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7
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7
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5
V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 6
Efficiency Data
Module 5.0V
74%
76%
78%
80%
82%
84%
86%
88%
90%
92%
94%
96%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
8.0V
10.8V
13.2V
Module 3.3V
66%
70%
74%
78%
82%
86%
90%
94%
98%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
4.5V
8.0V
13.2V
Module 2.5V
64%
68%
72%
76%
80%
84%
88%
92%
96%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
I
C
I
E
NCY
4.5V
8.0V
13.2V
Module 1.8V
62%
66%
70%
74%
78%
82%
86%
90%
94%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
I
CI
E
NCY
4.5V
8.0V
13.2V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
Efficiency Data
page 7
Module 1.5V
60%
64%
68%
72%
76%
80%
84%
88%
92%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
FFI
C
I
E
N
C
Y
4.5V
8.0V
13.2V
Module 1.2V
56%
60%
64%
68%
72%
76%
80%
84%
88%
92%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
I
CI
E
N
CY
4.5V
8.0V
13.2V
Module 1.0V
54%
58%
62%
66%
70%
74%
78%
82%
86%
90%
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
OUTPUT CURRENT
E
F
F
IC
IE
N
C
Y
4.5V
8.0V
13.2V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 8
Ripple and Noise
Ripple and noise at full load and 8Vdc input,
5.0Vdc output and Ta=25 C
Ripple and noise at full load and 8Vdc input,
3.3Vdc output and Ta=25 C
Ripple and noise at full load and 8Vdc input,
2.5Vdc output and Ta=25 C
1F ceramic cap and 10F aluminum electrolytic cap added at the output.
Ripple and noise at full load and 8Vdc input,
1.8Vdc output and Ta=25 C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
Ripple and Noise
1F ceramic cap and 10F aluminum electrolytic cap added at the output.
Ripple and noise at full load and 8Vdc input,
1.5Vdc output and Ta=25 C
Ripple and noise at full load and 8Vdc input,
1.2Vdc output and Ta=25 C
Ripple and noise at full load and 8Vdc input,
1.0Vdc output and Ta=25 C
page 9
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 10
Transient Response
Transient response: di/dt = 0.5A/S, with external 220F Tan capacitor.
Vout=5.0V
50% to 100% load transients at 8V input and Ta=25 C
Vout=5.0V
100% to 50% load transients at 8V input and Ta=25 C
Vout=3.3V
50% to 100% load transients at 8V input and Ta=25 C
Vout=3.3V
100% to 50% load transients at 8V input and Ta=25 C
Vout=2.5V
50% to 100% load transients at 8V input and Ta=25 C
Vout=2.5V
100% to 50% load transients at 8V input and Ta=25 C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 11
Transient Response
Vout=1.5V
50% to 100% load transients at 8V input and Ta=25 C
Vout=1.8V
50% to 100% load transients at 8V input and Ta=25 C
Vout=1.8V
100% to 50% load transients at 8V input and Ta=25 C
Vout=1.5V
100% to 50% load transients at 8V input and Ta=25 C
Transient response: di/dt = 0.5A/S, with external 220F Tan capacitor.
Vout=1.2V
50% to 100% load transients at 8V input and Ta=25 C
Vout=1.2V
100% to 50% load transients at 8V input and Ta=25 C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
Thermal Considerations
Transient Response
Vout=1.0V
50% to 100% load transients at 8V input and Ta=25 C
Vout=1.0V
100% to 50% load transients at 8V input and Ta=25 C
Transient response: di/dt = 0.5A/S, with external 220F Tan capacitor.
page 12
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 13
Output Voltage Set-Point Adjustment
Vo
Trim
Gnd
Vo
Trim
Gnd
Trim Down Test Circuit
Trim Up Test Circuit
Output Voltage Set-Point Adjustment
S7DB-10E50x Trim Resistor Calculation
4.5
4.55
4.6
4.65
4.7
4.75
4.8
4.85
4.9
4.95
5
10
309
608
907
1206
1505
1804
2103
2402
2701
3000
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
5
5.05
5.1
5.15
5.2
5.25
5.3
5.35
5.4
5.45
5.5
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
re
s
i
s
t
o
r
v
a
l
u
e
,
Rt
ri
m
_
u
p
(K
o
h
m
)
Kohm
adj
Vo
Vo
down
Rtrim
)
61
.
31
,
91
.
61
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
9
.
16
,
768
.
11
(
_
-
-
=
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
2.25
2.27
2.3
2.33
2.35
2.38
2.4
2.42
2.45
2.48
2.5
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
2.5
2.52
2.55
2.58
2.6
2.63
2.65
2.67
2.7
2.73
2.75
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
,
R
t
r
i
m
_
up(
K
ohm
)
Kohm
adj
Vo
Vo
down
Rtrim
)
43
.
14
,
568
.
7
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
10
,
544
.
3
(
_
-
-
=
2.97
3
3.04
3.07
3.1
3.13
3.17
3.2
3.23
3.27
3.3
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
3.3
3.33
3.37
3.4
3.43
3.46
3.5
3.53
3.56
3.6
3.63
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
,
R
t
r
i
m
_
up(
K
o
hm
)
Kohm
adj
Vo
Vo
down
Rtrim
)
82
.
6
,
964
.
7
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
65
.
3
,
536
.
2
(
_
-
-
=
page 14
S7DB-10E33x Trim Resistor Calculation
S7DB-10E25x Trim Resistor Calculation
Output Voltage Set-Point Adjustment
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
1.35
1.37
1.38
1.4
1.41
1.43
1.44
1.46
1.47
1.49
1.5
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
1.5
1.51
1.53
1.54
1.56
1.58
1.59
1.61
1.62
1.64
1.65
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
re
s
i
s
t
o
r
v
a
l
u
e
,
Rt
ri
m
_
u
p
(K
o
h
m
)
Kohm
adj
Vo
Vo
down
Rtrim
)
71
.
11
,
716
.
2
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
87
.
7
,
072
.
3
(
_
-
-
=
1.62
1.64
1.66
1.67
1.69
1.71
1.73
1.75
1.76
1.78
1.8
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
1.8
1.82
1.84
1.85
1.87
1.89
1.91
1.93
1.94
1.96
1.98
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
,
R
t
r
i
m
_
up(
K
ohm
)
Kohm
adj
Vo
Vo
down
Rtrim
)
84
.
13
,
869
.
3
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
10
,
072
.
3
(
_
-
-
=
page 15
S7DB-10E18x Trim Resistor Calculation
S7DB-10E15x Trim Resistor Calculation
Output Voltage Set-Point Adjustment
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.97
0.98
0.99
1
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
1
1.01
1.02
1.03
1.04
1.05
1.06
1.07
1.08
1.09
1.1
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
re
s
i
s
t
o
r
v
a
l
u
e
,
Rt
ri
m
_
u
p
(K
o
h
m
)
Kohm
adj
Vo
Vo
down
Rtrim
)
17
.
4
,
658
.
0
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
1
,
536
.
2
(
_
-
-
=
1.08
1.09
1.1
1.12
1.13
1.14
1.15
1.16
1.18
1.19
1.2
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj (V)
T
r
i
m
r
e
s
i
s
t
or
va
l
u
e
R
t
r
i
m
_
dow
n(
K
ohm
)
1.2
1.21
1.22
1.24
1.25
1.26
1.27
1.28
1.3
1.31
1.32
0.01
30.01
60.01
90.01
120.01
150.01
180
210
240
270
Adjusted output voltage Vo,adj(V)
T
r
i
m
re
s
i
s
t
o
r
v
a
l
u
e
,
Rt
ri
m
_
u
p
(K
o
h
m
)
Kohm
adj
Vo
Vo
down
Rtrim
)
48
.
8
,
562
.
1
(
_
-
-
=
Kohm
Vo
adj
Vo
up
Rtrim
)
64
.
4
,
072
.
3
(
_
-
-
=
S7DB-10E12x Trim Resistor Calculation
S7DB-10E10x Trim Resistor Calculation
Output Voltage Set-Point Adjustment
page 16
CORPORATE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel
201-432-0463
Fax
201-432-9542
www.belfuse.com
FAR EAST
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel
852-2328-5515
Fax 852-2352-3706
www.belfuse.com
EUROPE
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel
44-1772-556601
Fax 44-1772-888366
www.belfuse.com
2003 Bel Fuse Inc. Specifications subject to change without notice. 11.03
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
BP03S7DB-10E
4.5V 13.2V Input / 1.0V 5.0V Output / 10A
page 17
Mechanical
Dimensions are in inches [millimeters].
Standard dimension tolerance is 0.005 [0.13] unless otherwise noted.
1.22 [30.99]
0.394 [10.01]
0.67
[17.00]
0.985 [25.02]
0.102 0.002
[2.59 0.05]
6X
0.197
[5.00]
5X
0.345 0.010
[8.76 0.25]
0.010
[0.25]
0.827 0.010
[21.01 0.25]
0.050 [1.27] 2X
0.078 [1.99] 2X
0.004 [0.10]
0- 5
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+
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1
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+
1
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